Overview
Bromelain is a mixture of protein-digesting enzymes derived from pineapple stems and fruit. Discovered in the late 19th century, it has gained industrial significance due to its ability to break down proteins under mild conditions. The enzyme complex primarily consists of cysteine proteases like stem bromelain and fruit bromelain. In B2B contexts, bromelain is traded as a standardized powder with activity measured in Gelatin Digesting Units (GDU) or FIP (Fédération Internationale Pharmaceutique) units. Its natural origin and biodegradability make it preferable to synthetic alternatives in food and cosmetic applications.
Physical and Chemical Properties
Bromelain exhibits optimal activity at 40-60°C and pH 4.5-5.5, though it remains functional in wider ranges. The enzyme loses activity rapidly above 60°C due to protein denaturation. Its isoelectric point is around pH 9.5, affecting solubility in different buffers. Industrial-grade bromelain typically contains 2,000-3,000 GDU/g. The enzyme shows stability when lyophilized (freeze-dried), retaining >90% activity after 12 months at 4°C. In solution, it requires stabilizers like glycerol or sucrose to prevent autolysis.
Main Applications
In food processing, bromelain serves as a natural meat tenderizer, breaking down collagen in tough cuts. Breweries use it to prevent chill haze by digesting proteins in beer. The pharmaceutical industry employs medical-grade bromelain (≥2,400 FIP/g) for anti-inflammatory formulations and wound care products. The supplement market utilizes bromelain for digestive health products, often combined with papain. Emerging applications include cosmetic exfoliants and biofilm removal in industrial cleaning. In biotechnology, it's used for antibody fragmentation due to its specific cleavage sites.
Safety and Storage
Bromelain may trigger allergic reactions in pineapple-sensitive individuals. Workplace exposure requires dust masks and eye protection. Spills should be rinsed with copious water, not organic solvents. For storage, airtight containers with desiccants are recommended. Liquid formulations require preservatives like sodium benzoate. Transport should maintain the cold chain (2-8°C) for high-value pharmaceutical grades. Bulk shipments exceeding 25kg often use vacuum-sealed foil bags.
B2B Procurement Guide
Buyers should specify required activity levels (GDU or FIP units), with food-grade starting at 1,200 GDU/g. Kosher, Halal, and non-GMO certifications add 15-20% to baseline costs. South American and Southeast Asian suppliers dominate bulk markets, with analytical COAs (Certificates of Analysis) being essential. Sample testing should measure not just activity but also microbial counts (<1,000 CFU/g for food grade). Payment terms often include 30% advance for first-time orders. Container-load shipments (20-25 MT) attract 8-12% discounts compared to pallet quantities.
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